I am trying test the rsa 186-2 openssl fips module 2.0.16 implementation using the NIST Testvectors. Using the fips_rsastest.c file the FIPS_rsa_x931_generate_key_ex(rsa, keylen, bn_e, NULL) function called to generate the modulus n as the output and taking modulus size as the input i,e [mod=1024]. Then this modulus along with the appropriate hash function and message is passed to FIPS_rsa_sign(rsa, Msg, Msglen, dgst, pad_mode, Saltlen, NULL,sigbuf, (unsigned int *)&siglen) to obtain the signature as the output. But each time i execute the c code it generates different modulus n. Why is output changing after every execution. What am i doing wrong? I am facing the same problem with DSA parameter generation also. It will help me.
-- With Regards, Swetha H -- With Regards, Swetha H
/* fips_rsastest.c */ /* Written by Dr Stephen N Henson (st...@openssl.org) for the OpenSSL * project 2005. */ /* ==================================================================== * Copyright (c) 2005 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licens...@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (e...@cryptsoft.com). This product includes software written by Tim * Hudson (t...@cryptsoft.com). * */ #define OPENSSL_FIPSAPI #include <stdio.h> #include <ctype.h> #include <string.h> #include <openssl/bio.h> #include <openssl/evp.h> #include <openssl/hmac.h> #include <openssl/err.h> #include <openssl/bn.h> #ifndef OPENSSL_FIPS int main(int argc, char *argv[]) { printf("No FIPS RSA support\n"); return(0); } #else #include <openssl/rsa.h> #include <openssl/fips.h> #include "fips_utl.h" static int rsa_stest(FILE *out, FILE *in, int Saltlen); static int rsa_printsig(FILE *out, RSA *rsa, const EVP_MD *dgst, unsigned char *Msg, long Msglen, int Saltlen); #ifdef FIPS_ALGVS int fips_rsastest_main(int argc, char **argv) #else int main(int argc, char **argv) #endif { FILE *in = NULL, *out = NULL; int ret = 1, Saltlen = -1; fips_algtest_init(); Saltlen = -2; in = fopen("SigGenRSA_186-2.req", "r"); out = fopen("out.rsp", "w"); if (!in) { fprintf(stderr, "FATAL input initialization error\n"); goto end; } if (!out) { fprintf(stderr, "FATAL output initialization error\n"); goto end; } if (!rsa_stest(out, in, Saltlen)) { fprintf(stderr, "FATAL RSASTEST file processing error\n"); goto end; } else ret = 0; end: if (in && (in != stdin)) fclose(in); if (out && (out != stdout)) fclose(out); return ret; } #define RSA_TEST_MAXLINELEN 10240 int rsa_stest(FILE *out, FILE *in, int Saltlen) { char *linebuf, *olinebuf, *p, *q; char *keyword, *value; RSA *rsa = NULL; const EVP_MD *dgst = NULL; unsigned char *Msg = NULL; long Msglen = -1; int keylen = -1, current_keylen = -1; int ret = 0; int lnum = 0; olinebuf = OPENSSL_malloc(RSA_TEST_MAXLINELEN); linebuf = OPENSSL_malloc(RSA_TEST_MAXLINELEN); if (!linebuf || !olinebuf) goto error; while (fgets(olinebuf, RSA_TEST_MAXLINELEN, in)) { lnum++; strcpy(linebuf, olinebuf); keyword = linebuf; /* Skip leading space */ while (isspace((unsigned char)*keyword)) keyword++; /* Look for = sign */ p = strchr(linebuf, '='); /* If no = just copy */ if (!p) { if (fputs(olinebuf, out) < 0) goto error; continue; } q = p - 1; /* Remove trailing space */ while (isspace((unsigned char)*q)) *q-- = 0; *p = 0; value = p + 1; /* Remove leading space from value */ while (isspace((unsigned char)*value)) value++; /* Remove trailing space from value */ p = value + strlen(value) - 1; while (*p == '\n' || isspace((unsigned char)*p)) *p-- = 0; /* Look for [mod = XXX] for key length */ if (!strcmp(keyword, "[mod")) { p = value + strlen(value) - 1; if (*p != ']') goto parse_error; *p = 0; keylen = atoi(value); if (keylen < 0) goto parse_error; } else if (!strcmp(keyword, "SHAAlg")) { if (!strcmp(value, "SHA1")) dgst = EVP_sha1(); else if (!strcmp(value, "SHA224")) dgst = EVP_sha224(); else if (!strcmp(value, "SHA256")) dgst = EVP_sha256(); else if (!strcmp(value, "SHA384")) dgst = EVP_sha384(); else if (!strcmp(value, "SHA512")) dgst = EVP_sha512(); else { fprintf(stderr, "FATAL: unsupported algorithm \"%s\"\n", value); goto parse_error; } } else if (!strcmp(keyword, "Msg")) { if (Msg) goto parse_error; if (strlen(value) & 1) *(--value) = '0'; Msg = hex2bin_m(value, &Msglen); if (!Msg) goto parse_error; } fputs(olinebuf, out); /* If key length has changed, generate and output public * key components of new RSA private key. */ if (keylen != current_keylen) { BIGNUM *bn_e; if (rsa) FIPS_rsa_free(rsa); rsa = FIPS_rsa_new(); if (!rsa) goto error; bn_e = BN_new(); if (!bn_e || !BN_set_word(bn_e, 0x010001)) goto error; printf("keylen:%d\n",keylen); FIPS_mode_set(0); if (!FIPS_rsa_x931_generate_key_ex(rsa, keylen, bn_e, NULL)) goto error; BN_free(bn_e); fputs("n = ", out); do_bn_print(out, rsa->n); fputs(RESP_EOL "e = ", out); do_bn_print(out, rsa->e); fputs(RESP_EOL, out); current_keylen = keylen; } if (Msg && dgst) { if (!rsa_printsig(out, rsa, dgst, Msg, Msglen, Saltlen)) goto error; OPENSSL_free(Msg); Msg = NULL; } } ret = 1; error: if (olinebuf) OPENSSL_free(olinebuf); if (linebuf) OPENSSL_free(linebuf); if (rsa) FIPS_rsa_free(rsa); return ret; parse_error: fprintf(stderr, "FATAL parse error processing line %d\n", lnum); goto error; } static int rsa_printsig(FILE *out, RSA *rsa, const EVP_MD *dgst, unsigned char *Msg, long Msglen, int Saltlen) { int ret = 0; unsigned char *sigbuf = NULL; int i, siglen, pad_mode; /* EVP_PKEY structure */ siglen = RSA_size(rsa); sigbuf = OPENSSL_malloc(siglen); if (!sigbuf) goto error; if (Saltlen >= 0) pad_mode = RSA_PKCS1_PSS_PADDING; else if (Saltlen == -2) pad_mode = RSA_X931_PADDING; else pad_mode = RSA_PKCS1_PADDING; FIPS_mode_set(0); if (!FIPS_rsa_sign(rsa, Msg, Msglen, dgst, pad_mode, Saltlen, NULL, sigbuf, (unsigned int *)&siglen)) goto error; fputs("S = ", out); for (i = 0; i < siglen; i++) fprintf(out, "%02X", sigbuf[i]); fputs(RESP_EOL, out); ret = 1; error: if (sigbuf) OPENSSL_free(sigbuf); return ret; } #endif
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